
body {  
    font-family: Arial, sans-serif;  
    margin: 0;  
    padding: 0;  
    line-height: 1.6;  
}  
  
header {  
    background-color: #333;  
    color: #fff;  
    padding: 1rem 0;  
    text-align: center;  
}  
  
nav ul {  
    list-style: none;  
    padding: 0;  
    text-align: center;  
}  
  
nav ul li {  
    display: inline;  
    margin: 0 10px;  
}  
  
nav ul li a {  
    text-decoration: none;  
    color: #000;  
}  
  
section {  
    padding: 2rem;  
    text-align: center;  
}  
  
footer {  
    background-color: #333;  
    color: #fff;  
    text-align: center;  
    padding: 1rem 0;  
    position: fixed;  
    width: 100%;  
    bottom: 0;  
}  
  
/* 可以添加更多CSS样式来美化页面 */
